Jon Flanagan was at the centre of a controversial clash during Glasgow derby when the Rangers defender collided with Celtic midfielder Scott Brown in the box.
With the SPL title already secured, Neil Lennon's outfit arrived in the Ibrox Stadium looking to finish their league campaign on a high. However, they went behind in the first half after an early James Tavernier goal.
There was further drama at the start of the second half when Jon Flanagan was booked after his efforts to mark Scott Brown from a corner. The former Liverpool man appeared to strike Brown with his forearm. He was shown a yellow card for the incident and a re-take of the corner was ordered as the ball was not in play.
Speaking on Sky Sports, former Celtic and Scotland player Andy Walker claimed it "could easily have been a red card" and said the referee's focus wasn't on the pair: "He hasn't seen the severity of it, that's why he has shown a yellow card and no penalty."
It went from bad to worse for the away side shortly after, as Scott Arfield added a second goal.